Gemstone cluster



FIG. 1 is a top plan view of a gemstone cluster showing my new design where the broken lines represent environmental matter and form no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof where the opposite side view and front and rear elevational views are identical; and,

FIG. 5 is another side elevational view thereof where the broken lines represent environmental matter and form no part of the claimed design.

The broken lines shown in the drawings represent environmental structure and form no part of the claimed design. 

The ornamental design for a gemstone cluster, as shown and described. 